package com.dgut.courses_selecting_sys.controller;

import com.dgut.courses_selecting_sys.entity.AjaxResult;
import com.dgut.courses_selecting_sys.utils.ShiroUtils;
import com.dgut.courses_selecting_sys.utils.core.ServletUtils;
import com.dgut.courses_selecting_sys.utils.core.StringUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
@Controller
public class LoginController {

    @GetMapping({"/login","/"})
    public String login(HttpServletRequest request, HttpServletResponse response)
    {
        // 如果是Ajax请求，返回Json字符串。
        if (ServletUtils.isAjaxRequest(request))
        {
            return ServletUtils.renderString(response, "{\"code\":\"1\",\"msg\":\"未登录或登录超时。请重新登录\"}");
        }
        //登录成功跳转首页
        if(ShiroUtils.getSubject().isAuthenticated()==true){
            return "index";
        }
        //否则返回登录页
        return "login";
    }

    /**
     * 登录
     * @param username
     * @param password
     * @param rememberMe
     * @return
     */
    @PostMapping("/login")
    @ResponseBody
    public AjaxResult ajaxLogin(String username, String password, boolean rememberMe)
    {
        UsernamePasswordToken token = new UsernamePasswordToken(username, password, rememberMe);
        Subject subject = SecurityUtils.getSubject();
        try
        {
            subject.login(token);
            return AjaxResult.success();
        }
        catch (AuthenticationException e)
        {
            String msg = "用户或密码错误";
            if (StringUtils.isNotEmpty(e.getMessage()))
            {
                msg = e.getMessage();
            }
            return AjaxResult.error(msg);
        }
    }


}
